<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图 -->
    <el-card>
      <!-- 添加分类标签 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">
            添加分类
          </el-button>
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text=""
        border
        class="treeTable"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-circle-check"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
          ></i>
          <i class="el-icon-circle-close" v-else style="color: red"></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            size="mini"
            type="success"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt" slot-scope="scope">
          <el-button
            size="mini"
            type="primary"
            icon="el-icon-edit"
            @click="editCateName(scope.row)"
            >编辑</el-button
          >
          <el-button
            size="mini"
            type="danger"
            icon="el-icon-delete"
            @click="delectCateName(scope.row)"
            >删除</el-button
          >
        </template>
      </tree-table>
      <!-- 分页区 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>

      <!-- 添加分类 -->
      <el-dialog
        title="添加分类"
        :visible.sync="addCateDialogVisible"
        width="50%"
        @close="addCateDialogClose"
      >
        <!-- 添加分类表单 -->
        <el-form
          :model="addCateForm"
          :rules="addCateFormRules"
          ref="addCateFormRef"
          label-width="100px"
        >
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="addCateForm.cat_name"></el-input>
          </el-form-item>
          <el-form-item label="父级分类">
            <!-- options用来指定数据源 -->
            <el-cascader
              v-model="selectedKeys"
              :options="parentCateList"
              expand-trigger="hover"
              :props="cascaderProps"
              @change="parentCateChanged"
              clearable

            ></el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addCateDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addCate">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 编辑分类 -->
      <el-dialog
        title="修改分类名称"
        :visible.sync="editFormDialogVisible"
        width="50%"
      >
        <el-form
          :model="editForm"
          :rules="editFormRules"
          ref="editFormRef"
          label-width="100px"
        >
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="editForm.cat_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editFormDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editCateNameInfo">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 删除分类 -->
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      // 商品分类数据列表
      catelist: [],
      total: 0,
      columns: [
        {
          label: "分类名称",
          prop: "cat_name",
        },
        {
          label: "是否有效",
          type: "template",
          template: "isok",
        },
        {
          label: "排序",
          type: "template",
          template: "order",
        },
        {
          label: "操作",
          type: "template",
          template: "opt",
        },
      ],
      // 控制添加分类对话框显示隐藏
      addCateDialogVisible: false,
      // 添加分类的表单对象
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0,
      },
      // 添加分类验证规则
      addCateFormRules: {
        cat_name: [
          { required: true, message: "输入分类名称", trigger: "blur" },
        ],
      },
      // 父级分类列表
      parentCateList: [],
      // 指定级联选择器的配置
      cascaderProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      // 选中的父级分类的id数组
      selectedKeys: [],
      // 修改分类表单框显示隐藏
      editFormDialogVisible: false,
      editForm: [{ cat_name: "", cat_id: 0 }],
      editFormRules: {
        cat_name: [
          { required: true, message: "输入分类名称", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //   获取商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.queryInfo,
      });
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类数据失败");
      this.catelist = res.data.result;
      this.total = res.data.total;
    },
    // 监听pagesize改变事件
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCateList();
    },
    handleCurrentChange(newNum) {
      this.queryInfo.pagenum = newNum;
      this.getCateList();
    },
    // 展示添加分类
    showAddCateDialog() {
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },

    // 获取父级分类的数据列表
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: {
          type: 2,
        },
      });
      if (res.meta.status !== 200)
        return this.$message.error("获取父级分类列表失败");
      this.parentCateList = res.data;
    },
    // 选择项发生变化事件
    parentCateChanged() {
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ];
        this.addCateForm.cat_level = this.selectedKeys.length;
        return;
      } else {
        console.log(">>>>>>>>>>>>>>>>>>>>>>>");
        this.addCateForm.cat_pid = 0;
        this.addCateForm.cat_level = 0;
      }
    },
    // 添加新分类
    addCate() {
      //   console.log(this.addCateForm)
      this.$refs.addCateFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          "categories",
          this.addCateForm
        );
        if (res.meta.status !== 201) return this.$message.error("添加分类失败");
        this.getCateList();
        this.addCateDialogVisible = false;
      });
    },
    // 监听对话框关闭事件
    addCateDialogClose() {
      this.$refs.addCateFormRef.resetFields();
      this.selectedKeys = [];
      this.addCateForm.cat_pid = 0;
      this.addCateForm.cat_level = 0;
    },
    // 编辑分类
    async editCateName(cate) {
      console.log(cate);
      const { data: res } = await this.$http.get("categories/" + cate.cat_id);
      if (res.meta.status !== 200) return this.$message.error("查询失败");
      this.$message.success("查询成功");
      console.log(res);

      this.editForm = res.data;
      this.editFormDialogVisible = true;
    },
    // 编辑分类提交
    editCateNameInfo() {
        // 判断规则是否通过
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        // 发起修改用户信息数据请求
        const { data: res } = await this.$http.put(
          "categories/" + this.editForm.cat_id,
          {
            cat_name: this.editForm.cat_name,
          }
        );
        if (res.meta.status !== 200)
          return this.$message.error("更新用户信息失败!");
        this.editFormDialogVisible = false;
        this.getCateList();
        this.$message.success("更新用户信息成功");
      });
    },
    // 删除分类
    async delectCateName(cate) {
      // 弹框询问是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该分类, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
          center: true,
        }
      ).catch((err) => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("取消删除");
      }
      const { data: res } = await this.$http.delete(
        "categories/" + cate.cat_id
      );
      if (res.meta.status !== 200) return this.$message.error("删除失败");
      this.$message.success("删除成功");
      this.getCateList();
    },
  },
};
</script>

<style lang="less" scoped>
.treeTable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
}
</style>